well i got a new tank about three weeks ago and i have about 75 pounds of rock with only 80 pounds of sand. i have 6 damsels with 2 starfish and about 20 hermies. for equipment i have a 30 gallon sump with 1400gph over flow with 1.5 inch tubing, 35 watt uv sterilizer, fluval fx5, 300 watt...